US5735718A - Drive unit for boats - Google Patents

Drive unit for boats Download PDF

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Publication number
US5735718A
US5735718A US08/649,708 US64970896A US5735718A US 5735718 A US5735718 A US 5735718A US 64970896 A US64970896 A US 64970896A US 5735718 A US5735718 A US 5735718A
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US
United States
Prior art keywords
flywheel
drive
drive unit
flange
drive housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/649,708
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English (en)
Inventor
Ragnar Ekwall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volvo Penta AB
Original Assignee
Volvo Penta AB
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Filing date
Publication date
Application filed by Volvo Penta AB filed Critical Volvo Penta AB
Assigned to AB VOLVO PENTA reassignment AB VOLVO PENTA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EKWALL, RAGNAR
Application granted granted Critical
Publication of US5735718A publication Critical patent/US5735718A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels

Definitions

  • the present invention relates to a drive unit for boats, comprising an internal combustion engine with a flywheel fixed on a crank shaft and surrounded by a flywheel casing, and a propeller drive with a housing connected to said flywheel casing and an input shaft driven by said crank shaft.
  • drive units of this type for example outboard drive units
  • parts of the drive unit for example the rig, the propellers, the lower transmission housing of aluminum. Since these components are submerged in the water, it is important to see to it that measures are taken to prevent i.a. galvanic corrosion from shortening the useful life, should the parts be electrically connected to another submerged component of a metal which is more electro-positive, for example a keel of iron with stainless steel bolts which are grounded together with the engine block in a single-pole electric system.
  • the parts of the drive unit submerged under water can be protected by known methods, i.e. by mounting a sacrificial anode on the drive, or by painting with protective paint, or by a combination of these two measures.
  • Another known method of avoiding galvanic corrosion on the propeller drive e.g. a sailboat drive unit in a sailboat with an iron keel with stainless steel keel bolts, is to equip the boat with a two-pole electrical system, i.e. a system in which each electrical power consumer, such as the starting motor, the generator, the oil pressure sensor etc, is connected to the battery, via a positive and a negative conductor.
  • a two-pole electrical system is that the drive unit will be insulated from the rest of the electrical system and no attention must be paid to replacing the sacrificial anode or repainting with protective paint.
  • the purpose of the present invention is to provide a drive unit of the type described by way of introduction, which permits connecting the engine block to ground and where the electrical power consumers can thus be coupled to the battery via a single pole electrical system without risk that the submerged components of the drive will be subjected to galvanic corrosion.
  • the screws are mounted in bushings of insulating material. Spacer elements of insulating material are arranged between the flanges and between the bolt heads and the flange of the drive housing.
  • the flywheel is joined to the input shaft of the drive via an elastic coupling which has coupling halves which are electrically insulated from each other.
  • FIG. 1 shows a schematic sideview of a drive unit according to the invention in a schematically indicated sailboat hull
  • FIG. 2 shows a longitudinal section through the encircled area in FIG. 1.
  • the numeral 1 in FIG. 1 indicates a sailboat hull with a keel 2a and a rudder 2b spaced from each other.
  • the keel can be made of iron or lead and have stainless steel keel bolts 3 cast therein, which are screwed fast to the inside of the hull by means of nuts 4.
  • a drive unit consisting of an internal combustion engine 5, preferably a diesel engine, and a propeller drive 6 is bolted securely to an engine bed (not shown).
  • the drive 6 is a so-called S-drive and has a rig leg 7 which extends out through a sealed opening in the bottom of the hull.
  • the drive 6 is suspended in the engine 5 in a known manner by bolting a flange 8 on the upper transmission housing 9 of the drive unit to a flange 10 on the engine flywheel casing 11, as will be described in more detail with reference to FIG. 2.
  • the engine battery 12 has its minus pole connected to keel bolt 3 and the engine block 5.
  • the numeral 20 in FIG. 2 indicates the distal end of the engine crank shaft, to which a flywheel 21 is bolted and which is surrounded by the flywheel casing 11.
  • the flange 8 on a wall 22 of the upper transmission housing 9 of the drive is made with a number of bores 23 into which bushings 24 of electrically insulating material, e.g. a plastics material, are forced.
  • the flange 10 on the flywheel casing 11 has corresponding threaded bores 25. Washers 26, 27 of insulating material, e.g. a plastics material, are disposed on either side of the respective bushing 24, thus completing the electrical insulation from each other of the flywheel casing 11 and the upper transmission housing 9 of the drive, when the components are bolted 28 together.
  • the engine flywheel 21 is joined to an input shaft 29 to the upper transmission housing 9 of the drive, via an elastic coupling, generally designated 30, which comprises a metal ring 31 screwed securely to the flywheel 21, a metal disc 33 non-rotatably connected to said input shaft via a splines connection 32, and an intermediate ring 34 of an elastic material, e.g. rubber, which is vulcanized fast to the ring 31 and the disc 33.
  • a groove 35 opening towards the flange 8 has a guide ring 36 of electrically insulating material, against which a guide surface on a guide shoulder 37 on the drive housing flange 8 abuts.
  • propeller drive of outboard type but of course the invention is not limited to this type of propeller drive but also comprises propeller drives of inboard type, which, although lacking a rig leg of aluminum, can protect a bronze propeller for example against corrosion by insulating the engine and the crank shaft from the shaft housing and the input shaft.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Arrangement Of Transmissions (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
US08/649,708 1993-12-03 1994-11-29 Drive unit for boats Expired - Lifetime US5735718A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9304033A SE502126C2 (sv) 1993-12-03 1993-12-03 Drivaggregat för båtar med elektriskt isolerat propellerdrev
SE9304033 1993-12-03
PCT/SE1994/001147 WO1995015282A1 (fr) 1993-12-03 1994-11-29 Ensemble de propulsion pour bateaux

Publications (1)

Publication Number Publication Date
US5735718A true US5735718A (en) 1998-04-07

Family

ID=20391993

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/649,708 Expired - Lifetime US5735718A (en) 1993-12-03 1994-11-29 Drive unit for boats

Country Status (7)

Country Link
US (1) US5735718A (fr)
EP (1) EP0730545B1 (fr)
JP (1) JPH09505784A (fr)
AU (1) AU1207495A (fr)
DE (1) DE69412127T2 (fr)
SE (1) SE502126C2 (fr)
WO (1) WO1995015282A1 (fr)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6209409B1 (en) * 1997-09-19 2001-04-03 Koyo Seiko Co., Ltd. Housing structure for power steering system
US6478646B1 (en) * 1998-04-10 2002-11-12 Yanmar Diesel Engine Co., Ltd. Drive device of inboard and outboard engines
US20050098139A1 (en) * 2003-11-06 2005-05-12 Biel Michael J. Flywheel with torsional dampening ring
WO2006015421A1 (fr) * 2004-08-11 2006-02-16 Vector Marine Pty Ltd Developpements concernant la protection contre la corrosion
US7131385B1 (en) 2005-10-14 2006-11-07 Brunswick Corporation Method for braking a vessel with two marine propulsion devices
US7188581B1 (en) 2005-10-21 2007-03-13 Brunswick Corporation Marine drive with integrated trim tab
EP1775211A2 (fr) 2005-10-12 2007-04-18 Brunswick Corporation Embarcation et méthode pour le positionnement
EP1775212A2 (fr) 2005-10-12 2007-04-18 Brunswick Corporation Embarcation et méthode pour la manoeuvre
US20070093150A1 (en) * 2005-10-21 2007-04-26 Davis Richard A Protective marine vessel and drive
US7294031B1 (en) 2005-10-21 2007-11-13 Brunswick Corporation Marine drive grommet seal
US7387556B1 (en) 2006-03-01 2008-06-17 Brunswick Corporation Exhaust system for a marine propulsion device having a driveshaft extending vertically through a bottom portion of a boat hull
US7867046B1 (en) 2008-01-07 2011-01-11 Brunswick Corporation Torsion-bearing break-away mount for a marine drive
US20110153125A1 (en) * 2009-12-23 2011-06-23 Brunswick Corporation Systems and Methods for Orienting a Marine Vessel to Minimize Pitch or Roll
US8011983B1 (en) 2008-01-07 2011-09-06 Brunswick Corporation Marine drive with break-away mount
US8478464B2 (en) 2009-12-23 2013-07-02 Brunswick Corporation Systems and methods for orienting a marine vessel to enhance available thrust
US8924054B1 (en) 2013-03-14 2014-12-30 Brunswick Corporation Systems and methods for positioning a marine vessel
US9302756B1 (en) * 2014-05-27 2016-04-05 Brunswick Corporation Stern drives and flywheel housings for stern drives
US10259555B2 (en) 2016-08-25 2019-04-16 Brunswick Corporation Methods for controlling movement of a marine vessel near an object
US10322787B2 (en) 2016-03-01 2019-06-18 Brunswick Corporation Marine vessel station keeping systems and methods
US10324468B2 (en) 2017-11-20 2019-06-18 Brunswick Corporation System and method for controlling a position of a marine vessel near an object
US10429845B2 (en) 2017-11-20 2019-10-01 Brunswick Corporation System and method for controlling a position of a marine vessel near an object
US10633072B1 (en) 2018-07-05 2020-04-28 Brunswick Corporation Methods for positioning marine vessels
US10671073B2 (en) 2017-02-15 2020-06-02 Brunswick Corporation Station keeping system and method
US10845812B2 (en) 2018-05-22 2020-11-24 Brunswick Corporation Methods for controlling movement of a marine vessel near an object
US11530022B1 (en) 2018-07-10 2022-12-20 Brunswick Corporation Method for controlling heading of a marine vessel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2119692B1 (es) * 1996-07-12 1999-05-16 Lopez Calleja Lopez Jose Luis Dispositivo, sistema y procedimiento para aislar electricamente la estructura metalica de una embarcacion de una masa externa.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2051442A (en) * 1933-09-15 1936-08-18 Gen Motors Corp Resilient coupling for transmitting power
US3136281A (en) * 1962-03-23 1964-06-09 Kiekhaefer Corp Through transom drive shaft mounting for inboard-outboard drive
US4583953A (en) * 1982-03-11 1986-04-22 Yamaha Hatsudoki Kabushiki Kaisha Outboard motor
GB2169677A (en) * 1985-01-03 1986-07-16 Nihon Pillar Packing Company L An insulating reamer bolt
US4634391A (en) * 1985-06-27 1987-01-06 Brunswick Corporation Engine coupler for stern drive
US5009619A (en) * 1989-09-05 1991-04-23 Outboard Marine Corporation Corrosion protection system
US5465678A (en) * 1991-11-26 1995-11-14 Ekman; Christer V. Piece of hull for boats and vessels

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2051442A (en) * 1933-09-15 1936-08-18 Gen Motors Corp Resilient coupling for transmitting power
US3136281A (en) * 1962-03-23 1964-06-09 Kiekhaefer Corp Through transom drive shaft mounting for inboard-outboard drive
US4583953A (en) * 1982-03-11 1986-04-22 Yamaha Hatsudoki Kabushiki Kaisha Outboard motor
GB2169677A (en) * 1985-01-03 1986-07-16 Nihon Pillar Packing Company L An insulating reamer bolt
US4634391A (en) * 1985-06-27 1987-01-06 Brunswick Corporation Engine coupler for stern drive
US5009619A (en) * 1989-09-05 1991-04-23 Outboard Marine Corporation Corrosion protection system
US5465678A (en) * 1991-11-26 1995-11-14 Ekman; Christer V. Piece of hull for boats and vessels

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6209409B1 (en) * 1997-09-19 2001-04-03 Koyo Seiko Co., Ltd. Housing structure for power steering system
US6478646B1 (en) * 1998-04-10 2002-11-12 Yanmar Diesel Engine Co., Ltd. Drive device of inboard and outboard engines
US20050098139A1 (en) * 2003-11-06 2005-05-12 Biel Michael J. Flywheel with torsional dampening ring
US7073474B2 (en) 2003-11-06 2006-07-11 Brp Us Inc. Flywheel with torsional dampening ring
WO2006015421A1 (fr) * 2004-08-11 2006-02-16 Vector Marine Pty Ltd Developpements concernant la protection contre la corrosion
US7267068B2 (en) 2005-10-12 2007-09-11 Brunswick Corporation Method for maneuvering a marine vessel in response to a manually operable control device
EP1775211A2 (fr) 2005-10-12 2007-04-18 Brunswick Corporation Embarcation et méthode pour le positionnement
EP1775212A2 (fr) 2005-10-12 2007-04-18 Brunswick Corporation Embarcation et méthode pour la manoeuvre
US20070089660A1 (en) * 2005-10-12 2007-04-26 Eric Bradley Method for positioning a marine vessel
US7305928B2 (en) 2005-10-12 2007-12-11 Brunswick Corporation Method for positioning a marine vessel
US20070089654A1 (en) * 2005-10-12 2007-04-26 Eric Bradley Method for maneuvering a marine vessel in response to a manually operable control device
US7131385B1 (en) 2005-10-14 2006-11-07 Brunswick Corporation Method for braking a vessel with two marine propulsion devices
US7371140B2 (en) 2005-10-21 2008-05-13 Brunswick Corporation Protective marine vessel and drive
US7234983B2 (en) 2005-10-21 2007-06-26 Brunswick Corporation Protective marine vessel and drive
US20070137550A1 (en) * 2005-10-21 2007-06-21 Brunswick Corporation, A Delaware Corporation Marine Drive with Integrated Trim Tab
US20070224892A1 (en) * 2005-10-21 2007-09-27 Brunswick Corporation, A Delaware Corporation Protective Marine Vessel and Drive
US7294031B1 (en) 2005-10-21 2007-11-13 Brunswick Corporation Marine drive grommet seal
US20070093150A1 (en) * 2005-10-21 2007-04-26 Davis Richard A Protective marine vessel and drive
US7188581B1 (en) 2005-10-21 2007-03-13 Brunswick Corporation Marine drive with integrated trim tab
US7387556B1 (en) 2006-03-01 2008-06-17 Brunswick Corporation Exhaust system for a marine propulsion device having a driveshaft extending vertically through a bottom portion of a boat hull
US7867046B1 (en) 2008-01-07 2011-01-11 Brunswick Corporation Torsion-bearing break-away mount for a marine drive
US8011983B1 (en) 2008-01-07 2011-09-06 Brunswick Corporation Marine drive with break-away mount
US20110153125A1 (en) * 2009-12-23 2011-06-23 Brunswick Corporation Systems and Methods for Orienting a Marine Vessel to Minimize Pitch or Roll
US8417399B2 (en) 2009-12-23 2013-04-09 Brunswick Corporation Systems and methods for orienting a marine vessel to minimize pitch or roll
US8478464B2 (en) 2009-12-23 2013-07-02 Brunswick Corporation Systems and methods for orienting a marine vessel to enhance available thrust
US8924054B1 (en) 2013-03-14 2014-12-30 Brunswick Corporation Systems and methods for positioning a marine vessel
US9302756B1 (en) * 2014-05-27 2016-04-05 Brunswick Corporation Stern drives and flywheel housings for stern drives
US10322787B2 (en) 2016-03-01 2019-06-18 Brunswick Corporation Marine vessel station keeping systems and methods
US11260949B2 (en) 2016-03-01 2022-03-01 Brunswick Corporation Marine vessel station keeping systems and methods
US10259555B2 (en) 2016-08-25 2019-04-16 Brunswick Corporation Methods for controlling movement of a marine vessel near an object
US10671073B2 (en) 2017-02-15 2020-06-02 Brunswick Corporation Station keeping system and method
US11247753B2 (en) 2017-02-15 2022-02-15 Brunswick Corporation Station keeping methods
US10324468B2 (en) 2017-11-20 2019-06-18 Brunswick Corporation System and method for controlling a position of a marine vessel near an object
US10429845B2 (en) 2017-11-20 2019-10-01 Brunswick Corporation System and method for controlling a position of a marine vessel near an object
US10845812B2 (en) 2018-05-22 2020-11-24 Brunswick Corporation Methods for controlling movement of a marine vessel near an object
US10633072B1 (en) 2018-07-05 2020-04-28 Brunswick Corporation Methods for positioning marine vessels
US11530022B1 (en) 2018-07-10 2022-12-20 Brunswick Corporation Method for controlling heading of a marine vessel

Also Published As

Publication number Publication date
WO1995015282A1 (fr) 1995-06-08
DE69412127D1 (de) 1998-09-03
SE9304033D0 (sv) 1993-12-03
AU1207495A (en) 1995-06-19
EP0730545B1 (fr) 1998-07-29
SE9304033L (sv) 1995-06-04
EP0730545A1 (fr) 1996-09-11
SE502126C2 (sv) 1995-08-28
JPH09505784A (ja) 1997-06-10
DE69412127T2 (de) 1999-02-25

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